Problem
When uploading a big file to Send, we have to wait for it to be uploaded, only then do we get a link.
Effect
That means we are blocked until the link is ready(literally staring at the screen), or we might go do other stuff meanwhile and possibly forget about the Send link.
Solution
It would be great to generate the link ahead of time, and have the upload process be async. Worst case, the receiver should get a message saying it is being processed.